Comparison : Item # A075, RF Amplifier: 75W, 300 kHz - 35 MHz
Item # A150, RF Amplifier: 150W, 300 kHz - 35 MHz
Item # A500, 500W, 300 kHz - 35 MHz RF Amplifier
Item # A1000, 1000W, 300 kHz - 35 MHz RF Amplifier
Item # A300, 300W, 300 kHz - 35 MHz RF Amplifier